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Battery management system

a battery management and battery technology, applied in secondary cell servicing/maintenance, batteries, instruments, etc., can solve problems such as increasing leakage current, and achieve the effect of improving vehicle safety and effectively managing vehicle performan

Inactive Publication Date: 2018-03-01
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a battery management system that can detect sealing failures in battery cells and battery packs, improving safety and performance management of vehicles. This helps to prevent accidents and ensure reliable functioning of the battery.

Problems solved by technology

Sealing of a battery cell and a battery pack of the high voltage lithium-ion battery is a major factor affecting operation / performance and high voltage safety of the vehicle.
In the lithium-ion battery, inappropriate sealing of the battery cell may accelerate deterioration of the battery cell, and inappropriate sealing of the battery pack may cause an insulation breakdown, thereby causing or increasing a leakage current.

Method used

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Embodiment Construction

[0023]Features of the inventive concept and methods of accomplishing the same may be understood more readily by reference to the following detailed description of embodiments and the accompanying drawings. Hereinafter, example embodiments will be described in more detail with reference to the accompanying drawings, in which like reference numbers refer to like elements throughout. The present invention, however, may be embodied in various different forms, and should not be construed as being limited to only the illustrated embodiments herein. Rather, these embodiments are provided as examples so that this disclosure will be thorough and complete, and will fully convey the aspects and features of the present invention to those skilled in the art. Accordingly, processes, elements, and techniques that are not necessary to those having ordinary skill in the art for a complete understanding of the aspects and features of the present invention may not be described. Unless otherwise noted,...

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Abstract

An embodiment of the present invention provides a battery management system including an insulation resistance estimator configured to estimate insulation resistance corresponding to internal temperature and pressure of a battery pack to obtain an estimated value of the insulation resistance, a concentration estimator configured to estimate an internal gas concentration of the battery pack corresponding to the estimated value of the insulation resistance, a cell failure detector configured to detect whether a plurality of battery cells fail based on a state of charge (SOC) and a voltage of the plurality of battery cells accommodated in the battery pack, and a leak determiner configured to determine whether a battery cell leaks based on a detected result of the cell failure detector and based on the internal gas concentration corresponding to the estimated value of the insulation resistance.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to, and the benefit of, Korean Patent Application No. 10-2016-0110956 filed in the Korean Intellectual Property Office on Aug. 30, 2016, the entire contents of which are incorporated herein by reference.BACKGROUND1. Field[0002]Embodiments of the present invention relate to a battery management system.2. Description of the Related Art[0003]Recently, according to strengthening of environmental regulations, including CO2 regulations, interest in environmentally-friendly vehicles has been increasing. Accordingly, vehicle companies have been actively researching and developing pure electrical vehicles and hydrogen vehicles, as well as hybrid and plug-in hybrid vehicles.[0004]A high voltage battery for storing electrical energy obtained from various energy sources is applied to the environmentally-friendly vehicles. The high voltage battery applied to the vehicles may include a lithium-ion battery.[0005]Sealing o...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M10/42H01M10/48H01M10/0525H02J7/00
CPCH01M10/425H01M10/482H01M10/0525H01M2220/20H02J7/0026H01M2010/4271H01M2010/4278H01M10/4228H01M10/052H01M10/48H01M10/486G01R31/392G01R31/389Y02E60/10H01M10/484G01R31/396G01R31/3835G01R19/16542G01R27/025G01R31/52G01R19/1659G01R31/3646B60L58/16
Inventor KIM, DUK-JUNG
Owner SAMSUNG SDI CO LTD
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